Abstract: The system comprises a first motor for applying rotational energy to a respective first wheel of the vehicle. A second motor is arranged for applying rotational energy to a respective second wheel of the vehicle. A first inverter is coupled to the first motor, where the first inverter is capable of receiving direct current electrical energy from the direct current bus. The first inverter is configured to provide a first group of alternating currents with a corresponding reference phase. A second inverter is coupled to the second motor. The second inverter is capable of receiving direct current electrical energy from the direct current bus. The second inverter is configured to provide a second group of alternating currents with a phase shift with respect to the reference phase, such that the phase shift is effective to reduce the direct current ripple on the direct current bus.

Abstract: The system comprises a direct current bus having a positive terminal and a negative terminal. A first switching transistor and a second switching transistor have their respective switched terminals connected in series with respect to each other between the positive terminal and the negative terminal. A primary supply is arranged to generating a test voltage that is lower than an operational voltage of the direct current bus. The test voltage is applied between the positive terminal and the negative terminal of the direct current bus. A primary thermal circuit is associated with the supply for detecting whether the supply exceeds an operational temperature threshold. The thermal circuit provides a signal or logic level state indicative of a detected short circuit in the direct current bus if the primary supply exceeds the operational temperature threshold.

Abstract: Example embodiments disclose a drive system including a machine including a plurality of phases and configured to generate power based on a plurality of phase currents, each respectively associated with the plurality of phases and a direct current (DC) bus, operatively connected to the machine. The DC bus includes a high-side line, a low-side line, and an inverter including a plurality of switching systems, operatively connected between the high-side line and the low-side line, the plurality of switching systems, each configured to output a respective one of the plurality of phase currents. The drive system also includes a controller, operatively connected to the DC bus and the machine, the controller configured to determine if a failure exists in the drive system based on the plurality of phase currents and a DC bus voltage, the DC bus voltage being a voltage across the high-side line and the low-side line.